How Mortgages Work

A mortgage is a loan used to buy real estate where the property itself serves as collateral. You borrow money from a lender, agree to repay it over a set period with interest, and the lender holds a lien on the property until the loan is fully paid off.

The Core Components

Every mortgage has four key elements:

• •Principal — the amount you borrow
• •Interest rate — the cost of borrowing, expressed as a percentage
• •Term — how long you have to repay (typically 15 or 30 years)
• •Collateral — the property securing the loan

Your monthly payment covers principal and interest. Most lenders also collect property taxes and insurance through an escrow account, combining all four into one monthly payment called PITI.

How the Loan Is Paid Back

Mortgages use amortization — a repayment schedule where early payments are mostly interest and later payments are mostly principal. On a 30-year loan at 6.5%, your first payment might be 80% interest and only 20% principal. By year 25, that ratio flips.

This is why making extra payments early in the loan has a much bigger impact than making them later.

What Happens If You Stop Paying

If you fail to make payments, the lender can foreclose — taking ownership of the property and selling it to recover the loan balance. Foreclosure severely damages your credit and can take months to years to resolve.

Key Takeaways

• •A mortgage is a secured loan — the property is collateral
• •Your monthly payment includes principal, interest, taxes, and insurance
• •Amortization means early payments are interest-heavy
• •The lender can foreclose if you stop paying
• •Understanding the structure helps you make smarter payoff decisions